MySQL - pio train slow for the first engine.

[Kim Trang Le]

Dear all, 

I have 5 algorithms to train sequentially, I am using Similar Product template and with 400 000 records of data, the first engine takes rather long time for training than the others, which around 4 minutes, then the second engine will take only half a minute. 

When I try to change the order of the engines, the same issue happened, it always takes 4 minutes for the first engine regardless which engine is, if it is placed at the top, it will take 4 minutes to finish training,  then other 4 engines half a minute.

Does anyone know the root cause please help me?

Thank you very much.